Traction power supply system energy management optimization method integrating hybrid energy storage and photovoltaic devices

A traction power supply system and hybrid energy storage technology, applied in photovoltaic power generation, circuit devices, energy storage, etc., can solve the problems of urgent need to improve the control capability of power supply resources, imbalance, and no active control and adjustment of impact loads.

Active Publication Date: 2019-04-19
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

In addition, due to the unbalanced traction load of electrified railways, the power quality problem of the three-phase voltage imbalance in the existing power supply mode has become a prominent "bottleneck" that restricts the safe, reliable and efficient operation of the system
However

Method used

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  • Traction power supply system energy management optimization method integrating hybrid energy storage and photovoltaic devices
  • Traction power supply system energy management optimization method integrating hybrid energy storage and photovoltaic devices
  • Traction power supply system energy management optimization method integrating hybrid energy storage and photovoltaic devices

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Embodiment

[0143] In the present invention, the topology structure of the electrified railway traction power supply system integrating hybrid energy storage and photovoltaic devices is as follows: figure 1 As shown, its energy storage system parameters are shown in Table 1:

[0144] Table 1. Energy storage system parameters

[0145]

[0146] For other parameters, the photovoltaic area of ​​the photovoltaic power station is 10000m 2 , the photovoltaic efficiency is 12%, and the capacity of the photovoltaic converter is 2MVA; the capacities of the α-phase and β-phase of the back-to-back converters in the power flow controller are both 5MVA.

[0147] Compare with the traditional optimization method (the existing traction power supply system model with partitions at the exit of the traction substation) and the method of the present invention; the high-speed rail line, train and timetable parameters in the two models are consistent, and the load data of the traction station is determined ...

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Abstract

The invention discloses a traction power supply system energy management optimization method integrating hybrid energy storage and photovoltaic devices. The traction power supply system energy management optimization method comprises the steps of: step 1, acquiring traction substation load process data and a typical light intensity scene; step 2, establishing an objective function of an optimization model; step 3, establishing constraint conditions of the optimization model, and linearizing the constraint conditions of optimization model; step 4, establishing a hybrid integer linear programming model according to the objective function obtained in the step 2 and the constraint conditions obtained in the step 3; step 5, and solving the hybrid integer linear programming model obtained in thestep 4, so as to obtain the optimal charge and discharge power of the hybrid energy storage device, the optimal photovoltaic grid-connected power and the optimal power flow power of a back-to-back converter in a power flow controller, thereby completing the energy management optimization of a traction power supply system. The traction power supply system energy management optimization method improves the photovoltaic permeability and train regenerative braking energy utilization rate, reduces the electricity cost of electrified railways, and is closer to the reality.

Description

technical field [0001] The invention relates to an energy management optimization method for a traction power supply system integrating hybrid energy storage and photovoltaic devices. Background technique [0002] In order to reduce carbon emissions and promote green and sustainable development, my country has also joined the ranks of countries that reduce greenhouse gas emissions; in the field of rail transit, electrified railways, as a large energy consumer, have also begun to take measures to achieve energy conservation and emission reduction; considering the huge regeneration of high-speed trains Braking energy can be absorbed and reused by introducing a hybrid energy storage device combining batteries and supercapacitors into the railway system to realize the regenerative braking energy of trains. In addition, my country's renewable energy power generation has developed rapidly in recent years. However, in areas rich in wind and light resources along electrified railways...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/32
CPCH02J3/383H02J3/32H02J2203/20Y02E70/30
Inventor 陈民武刘元立陈垠宇潘自强田航刘思阳程哲程一林
Owner SOUTHWEST JIAOTONG UNIV
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